public class SimpleBuilder {

    private Homework homework;

    public SimpleBuilder(Homework homework) {
        this.homework = homework;
    }

    public void buildEasyQc(String easyQc) {
        homework.setEasyQc(easyQc);
    }

    public void buildNormalQc(String normalQc) {
        homework.setNormalQc(normalQc);
    }

    public void buildHardQc(String hardQc) {
        homework.setHardQc(hardQc);
    }

    public Homework build() {
        return homework;
    }
}